Driving belt



@ch 18,1932 P. B. REEVES 3,821

DRIVING BELT Filed July so. 1928 'lI/IIIIIIIIIIIIIIIIIIM I N VEN TOR.

BY Q ML A TTORNEYQ Patented Oct. 18, 1932 therefore, secure UNITED STATES PATENT OFFICE or coLnnBUs,

PAUL B. REEVES,

- GOLUHBUS, INDIANA, A

INDIANA, ASSIGNOB TO REEVES PUII'LEY COMPANY, O1!

CORPORATION OF INDIANA.

DRIVING BELT Application fled July 80, 1928. Serial No. 898,139.

Fig. 3 a. longitudinal section of a frag- 'ment of the belt shown in Figs. 1

an a

Fig. 4, a transverse section of the belt shown in Fig. 3;

Fig. 5, an elevation of the inner face of the belt shown in Figs. 1 to 4;

Fig. 6 an elevation, of another embodiment of my improved belt associated with a fiatfaced pulley and an adjustable cone-pair;

Fig. 7 a transverse section of the belt shown in Fig. 6; I

Fig. 8 an edge elevation of a fragment of another embodiment of my invention; an'

Fig. 9 is a transverse section of the form shown in Fig. 8.

In Figs. 1 to 5 and 8 and 9 inclusive Bindicates a flexible belt, composed of several laminations 10, 10, 10, said belt having a sufficient thickness to enable it to transmit the desired. power by reasons of forces or resistances applied to its edge by an adjustable cone-pair 12 and the exposed face of the inner laminations being of a character to properly faced pulley it. Such a belt would not, itself, be sufiiciently transversely rigid to properly coact with the cone-pair and I, to its outer face a plurality of stifi'ening plates 15, conveniently by screws 16, which plates extend almost, but not quite, to the side edges of this face of. the belt.

The sides of this belt are oppositely inclined inwardly to the inner face of the belt as shown in Fig. 1. Such a belt, with suflicient thickness to properly count with the cone-pair, would not be sufliciently flexible d rial 33, such of cross-pieces 32 are similarly faced, as

frictionally contact with a flatq to permit it to-properly coact faced pulley. To produce the desired flexigility I transversely groove one face of the elt.

In Figs. 1 to 5 the innerface of the belt with a flat.

is grooved with a multiplicit of transverse.

rooves 20, preferably equal y orming a plurality of laterally separated friction faces 21 of such dimensions as to be capable in groups of transmitting substantially the same power as will be involved in the coaction of the active portions of the edges of the belt with the cone-pair.

In Figs. 8 and 9 the outer face of the belt is channeled by the transverse grooves 25 between adjacent edges of the stiffener plates.

In the form shown in Figs. 6 and 7 the belt is composed of a comparatively thin spaced, thus medial web to the outer and inner faces of which are secured 1n pairs the rigid cross bars 31, 32 convenlently of wood, the ends of which are oppositely and inwardly inclined toward the inner faces of bars 32 to correspond with the angles of the faces of the cone-pair 12. The inclined faces of the cross pieces 31, 32 are faced with friction mate as leather, and the inner faces indicated at 34, said facings 34 pneferably coverin the inner ends of the bolts 35 by which t e cross ieces 31 and 32 are secured to the medialwe 30.

It is important that the belt be sufiiciently flexible at right angles to its plane of movement to permit its inner friction face to properly contact with the flat faced pulley around which it is to be passed and conseuently, when the active inner'face portions of the belt are relatively movable in the line of movement of the belt, as in the forms shown in Figs. 3, 4, 6 and 7, adjacent edges transversely of the belt of such active faces (21 in Figs. 3 and 5, and 34 in Figs. 6 and 7) must be actually separated from each other lengthwise of the belt except when the belt is fully '7 tional coaction with a flat-faced pulley cannot be obtained.

I claim as my invention:

1. A power transmission belt comprising flexed, as otherwise a proper frica plurality of attached layers of leather cooperating to provide at their opposite edges oppositely equally beveled driving surfaces a plurality of spaced stifit'ener plates applied to the Wider face of the belt, fastening men1 5 bers passing through said plates into the body of the belt, the narrowest layer of the belt presenting an inner peripheral driving surface transversely grooved to a depth less than the thickness of said la er. n 2. A power transmission elt comprising a plurality of attached layers of leather providing opposite driving edges oppositel equally beveled, a plurality of spaced stifi ener plates applied to the wider face of the belt, and fastening means passing through said plates into the body of the belt, the narrower layer of the belt presenting a driving surface and being formed, in said driving surface, with a plurality of transverse 2o grooves, by the removal of material therefrom to a depth less than the thickness of said layer.

In Witness whereof, I, PAUL B. REEVES, have hereunto set my hand at Columbus llndiana, this 26th day of July, A. D. one thousand nine hundred and twenty-ei ht.

PAUL B. RE VES. 

